Alert archive / Illinois / Lake County
Weather alerts in Lake County, Illinois, 2022
133 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Lake County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 133
- Warnings
- 31
- Watches
- 20
- Advisories
- 36
- Busiest month
- July35 alerts
- Busiest day
- July 23, 202213 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Lake County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 14 | 10 | 29% | 23 | 74% | 33 min |
| Flash flood warnings | 3 | 1 | 67% | 5 | 100% | 84 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Chicago, IL: tornado warnings | 15 | 3 | 80% | 15 | 60% | 13 min |
| NWS Chicago, IL: severe thunderstorm warnings | 148 | 102 | 31% | 466 | 77% | 26 min |
| NWS Chicago, IL: flash flood warnings | 19 | 8 | 58% | 33 | 79% | 95 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 4, 3:43 AM CST | Winter Weather Advisory | LOT | 41 hr |
| Jan 7, 2:17 PM CST | Winter Weather Advisory | LOT | 34 hr |
| Jan 22, 9:21 AM CST | Winter Weather Advisory | LOT | 32 hr |
| Jan 23, 3:17 PM CST | Winter Weather Advisory | LOT | 22 hr |
| Jan 25, 3:13 AM CST | Wind Chill Advisory | LOT | 31 hr |
| Jan 27, 9:13 PM CST | Winter Storm Warning | LOT | 17 hr |
| Jan 27, 9:13 PM CST | Winter Weather Advisory | LOT | 24 hr |
| Feb 1, 2:38 AM CST | Winter Weather Advisory | LOT | 39 hr |
| Feb 7, 3:00 AM CST | Winter Weather Advisory | LOT | 4 hr |
| Feb 16, 3:04 PM CST | Lakeshore Flood Advisory | LOT | 39 hr |
| Feb 16, 9:32 PM CST | Areal Flood Advisory | LOT | 12 hr |
| Feb 17, 9:21 AM CST | Areal Flood Advisory | LOT | 3 hr |
| Feb 17, 3:17 PM CST | Mesoscale Discussion | SPC | 118 min |
| Feb 18, 3:24 AM CST | Wind Advisory | LOT | 24 hr |
| Feb 18, 8:07 PM CST | Mesoscale Discussion | SPC | 3 hr |
| Feb 18, 8:42 PM CST | Snow Squall Warning | LOT | 63 min |
| Feb 18, 9:30 PM CST | Snow Squall Warning | LOT | 60 min |
| Feb 19, 2:08 PM CST | Wind Advisory | LOT | 25 hr |
| Feb 21, 2:01 PM CST | Flood Watch | LOT | 22 hr |
| Feb 22, 2:36 AM CST | Winter Weather Advisory | LOT | 16 hr |
| Feb 23, 2:50 PM CST | Winter Weather Advisory | LOT | 39 hr |
| Mar 5, 3:25 AM CST | Wind Advisory | LOT | 30 hr |
| Mar 5, 8:36 PM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Mar 5, 10:32 PM CST | Mesoscale Discussion | SPC | 88 min |
| Mar 5, 10:45 PM CST | Severe Thunderstorm Warning | LOT | 60 min |
| Mar 6, 2:36 PM CST | Winter Weather Advisory | LOT | 21 hr |
| Mar 25, 3:03 AM CDT | Wind Advisory | LOT | 19 hr |
| Mar 25, 2:18 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 5, 4:10 AM CDT | Dense Fog Advisory | LOT | 11 hr |
| Apr 13, 1:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Apr 13, 2:08 PM CDT | Wind Advisory | LOT | 21 hr |
| Apr 13, 4:42 PM CDT | Special Weather Statement | LOT | 48 min |
| Apr 14, 10:41 AM CDT | High Wind Warning | LOT | 8 hr |
| Apr 24, 12:04 PM CDT | Special Weather Statement | LOT | 41 min |
| Apr 25, 3:01 AM CDT | Freeze Warning | LOT | 24 hr |
| Apr 26, 3:20 AM CDT | Freeze Warning | LOT | 29 hr |
| Apr 30, 6:02 PM CDT | Mesoscale Discussion | SPC | 118 min |
| May 20, 7:10 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 25, 3:41 AM CDT | Beach Hazards Statement | LOT | 17 hr |
| May 25, 3:37 PM CDT | Mesoscale Discussion | SPC | 113 min |
| May 26, 3:29 PM CDT | Beach Hazards Statement | LOT | 37 hr |
| May 28, 2:59 PM CDT | Beach Hazards Statement | LOT | 31 hr |
| May 31, 3:40 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 12, 3:37 PM CDT | Heat Advisory | LOT | 3 days |
| Jun 13, 5:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 13, 5:46 PM CDT | Severe Thunderstorm Warning | LOT | 74 min |
| Jun 13, 5:51 PM CDT | Tornado Watch | SPC | 3 hr |
| Jun 13, 6:40 PM CDT | Areal Flood Advisory | LOT | 4 hr |
| Jun 16, 12:12 AM CDT | Special Weather Statement | LOT | 48 min |
| Jun 17, 2:18 PM CDT | Beach Hazards Statement | LOT | 25 hr |
| Jun 20, 2:40 PM CDT | Heat Advisory | LOT | 29 hr |
| Jul 4, 2:22 PM CDT | Heat Advisory | LOT | 30 hr |
| Jul 4, 8:07 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 4, 9:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| Jul 4, 10:55 PM CDT | Severe Thunderstorm Warning | LOT | 50 min |
| Jul 4, 11:16 PM CDT | Severe Thunderstorm Warning | LOT | 59 min |
| Jul 4, 11:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 4, 11:31 PM CDT | Areal Flood Advisory | LOT | 6 hr |
| Jul 4, 11:58 PM CDT | Severe Thunderstorm Warning | LOT | 62 min |
| Jul 5, 12:15 AM CDT | Flash Flood Warning | LOT | 5 hr |
| Jul 5, 3:54 AM CDT | Flood Watch | LOT | 23 hr |
| Jul 5, 3:32 PM CDT | Mesoscale Discussion | SPC | 118 min |
| Jul 5, 4:34 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 5, 6:29 PM CDT | Mesoscale Discussion | SPC | 91 min |
| Jul 5, 8:41 PM CDT | Mesoscale Discussion | SPC | 94 min |
| Jul 5, 10:24 PM CDT | Mesoscale Discussion | SPC | 96 min |
| Jul 7, 3:44 PM CDT | Beach Hazards Statement | LOT | 54 hr |
| Jul 11, 5:35 PM CDT | Special Weather Statement | LOT | 25 min |
| Jul 11, 5:51 PM CDT | Special Weather Statement | LOT | 24 min |
| Jul 13, 3:07 AM CDT | Beach Hazards Statement | LOT | 24 hr |
| Jul 21, 5:32 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 12:33 AM CDT | Severe Thunderstorm Warning | LOT | 57 min |
| Jul 23, 1:06 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 23, 1:23 AM CDT | Severe Thunderstorm Warning | LOT | 52 min |
| Jul 23, 1:58 AM CDT | Areal Flood Advisory | LOT | 5 hr |
| Jul 23, 2:30 AM CDT | Flash Flood Warning | LOT | 6 hr |
| Jul 23, 2:52 AM CDT | Flood Watch | LOT | 9 hr |
| Jul 23, 4:01 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 23, 5:35 AM CDT | Flash Flood Warning | LOT | 5 hr |
| Jul 23, 7:44 AM CDT | River Flood Warning | LOT | 27 hr |
| Jul 23, 10:57 AM CDT | Areal Flood Warning | LOT | 3 hr |
| Jul 23, 1:27 PM CDT | Areal Flood Warning | LOT | 6 hr |
| Jul 23, 2:28 PM CDT | Flood Watch | LOT | 20 hr |
| Jul 23, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 24, 12:41 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Jul 24, 3:10 AM CDT | Severe Thunderstorm Warning | LOT | 34 min |
| Aug 3, 1:13 PM CDT | Mesoscale Discussion | SPC | 62 min |
| Aug 3, 1:25 PM CDT | Severe Thunderstorm Warning | LOT | 35 min |
| Aug 3, 1:25 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 3, 3:43 PM CDT | Beach Hazards Statement | LOT | 32 hr |
| Aug 7, 5:02 AM CDT | Flood Watch | LOT | 29 hr |
| Aug 7, 3:37 PM CDT | Beach Hazards Statement | LOT | 48 hr |
| Aug 10, 3:39 AM CDT | Beach Hazards Statement | LOT | 54 hr |
| Aug 13, 3:07 PM CDT | Beach Hazards Statement | LOT | 43 hr |
| Aug 25, 4:46 AM CDT | Beach Hazards Statement | LOT | 41 hr |
| Aug 28, 1:09 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 28, 3:48 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Aug 28, 5:09 PM CDT | Special Weather Statement | LOT | 51 min |
| Aug 28, 5:30 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Aug 29, 9:42 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 29, 10:12 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| Aug 29, 12:14 PM CDT | Severe Thunderstorm Warning | LOT | 46 min |
| Aug 29, 12:53 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Sep 2, 2:53 PM CDT | Beach Hazards Statement | LOT | 67 hr |
| Sep 10, 4:09 AM CDT | Beach Hazards Statement | LOT | 59 hr |
| Sep 11, 2:38 AM CDT | Flood Watch | LOT | 31 hr |
| Sep 11, 1:34 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Sep 11, 2:19 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| Sep 11, 3:38 PM CDT | Areal Flood Warning | LOT | 9 hr |
| Sep 11, 10:01 PM CDT | River Flood Watch | LOT | 21 days |
| Sep 20, 12:22 PM CDT | Beach Hazards Statement | LOT | 7 hr |
| Sep 20, 4:54 PM CDT | Severe Thunderstorm Watch | SPC | 2 hr |
| Sep 20, 5:31 PM CDT | Severe Thunderstorm Warning | LOT | 59 min |
| Sep 21, 4:04 AM CDT | Beach Hazards Statement | LOT | 48 hr |
| Sep 24, 3:08 PM CDT | Beach Hazards Statement | LOT | 4 days |
| Sep 25, 6:42 PM CDT | Severe Thunderstorm Warning | LOT | 46 min |
| Oct 7, 3:06 AM CDT | Freeze Watch | LOT | 11 hr |
| Oct 7, 1:59 PM CDT | Freeze Warning | LOT | 18 hr |
| Oct 12, 12:35 PM CDT | Severe Thunderstorm Warning | LOT | 55 min |
| Oct 13, 2:26 PM CDT | Freeze Warning | LOT | 13 hr |
| Nov 4, 3:18 AM CDT | Wind Advisory | LOT | 40 hr |
| Nov 4, 2:05 PM CDT | Mesoscale Discussion | SPC | 115 min |
| Nov 5, 2:21 AM CDT | High Wind Warning | LOT | 17 hr |
| Nov 5, 9:51 AM CDT | Mesoscale Discussion | SPC | 114 min |
| Nov 5, 11:29 AM CDT | Severe Thunderstorm Warning | LOT | 63 min |
| Nov 14, 2:27 PM CST | Winter Weather Advisory | LOT | 35 hr |
| Dec 2, 3:39 AM CST | Wind Advisory | LOT | 29 hr |
| Dec 7, 1:02 AM CST | Dense Fog Advisory | LOT | 9 hr |
| Dec 8, 1:36 PM CST | Winter Weather Advisory | LOT | 23 hr |
| Dec 19, 2:30 PM CST | Winter Storm Watch | LOT | 44 hr |
| Dec 21, 10:41 AM CST | Winter Storm Warning | LOT | 3 days |
| Dec 24, 3:19 AM CST | Winter Weather Advisory | LOT | 9 hr |
| Dec 24, 1:05 PM CST | Wind Chill Advisory | LOT | 21 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 14 |
| Severe Thunderstorm Watch | 10 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 24 |
| Special Weather Statement | 6 |
| Flooding | |
| Areal Flood Warning | 3 |
| Flash Flood Warning | 3 |
| River Flood Warning | 1 |
| Flood Watch | 6 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 8 |
| Winter | |
| Snow Squall Warning | 2 |
| Winter Storm Warning | 2 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Freeze Warning | 4 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 2 |
| Wind and dust | |
| High Wind Warning | 2 |
| Wind Advisory | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| Lakeshore Flood Advisory | 1 |
| Beach Hazards Statement | 16 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.